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H. E. YARROW.

COOLING DEVICE FOR STEAM GENERATING APPARATUS 0F SUBMARINE VESSELS. APPLICATION FILED MAY], 1911.

1,3 12,662. I Patented Aug. 12, 1919.

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IIN'ITE STAT PATENT OFIBQE;

HAROLD EDGAR YAEROW, OF SCOTSTOUN, GLASGOW, SCOTLAND.

COOLING DEVICE FOR STEAM-GENERATING APPARATUS O13 SUBIVIARINE VESSELS.

Application filed May 7, 1917.

To all whom it may concern:

Be it known that I, HAROLD EDGAR YAR- now, a subject of the King of Great Brltain, residing at Scotstoun, Glasgow, Scotland, have invented certain new and useful Improvements Relating to Cooling Devices for Steam-Generating Apparatus of Submarine Vessels, of which the following is a specification.

When a submarine vessel propelled on the surface by steam is submerged and the boilers are shut down, there is a large quantity of heat stored up in the boiler for which there are no ready means of dissipation and which may form a source of extreme discomfort to the crew.

According to the present invention, the boiler is rapidly cooled down by the pro vision of pipes in the boiler, through which cold water, or other cooling medium can be caused to circulate when the vessel is sub merged and the fires are drawn.

In the accompanying drawing, which represents by way of example the application of the invention to a Yarrow water tube boiler, Figure 1 is a sectional elevation and Fig. 2 a vertical cross section showing a boiler.

The steam drum is shown at a and the water pockets at b, b; c, 0 are superheater drums, which may, or may not be provided; 03 is the uptake and boiler casing; e the brick-pan; f, ff steam generating tubes; 9 an air casing or the oil burners; pipes for cooling the steam drum and water pockets are shown at g and g respectively. Means Specification of Letters Patent.

Patented Aug. 12, 191%..

Serial No. 16?,042.

for circulating water through these pipes are shown at p, which may comprise a centrifugal pump, or other apparatus, such as a steam ejector; the pipes g, Q1 are connected to the circulating source by pipes s, s, and to the discharge, which may be a suitable drain or overboard, by pipes t, t. The suction to the water circulating apparatus is shown at 0.

Having thus described the nature of my said invention, and the best means I know of carrying the same into practical effect, I claim 1. In a submarine vessel, a boiler for gencrating steam; cooling pipes within the said boiler; and means for circulating a cooling medium through said cooling pipes when the fires have been drawn, thereby to convey away the heat stored in said boiler.

2. In a submarine vessel, a boiler for gen erating steam; cooling pipes within the said boiler; suction pipes conveying sea water to the said pipes within the boiler; discharge pipes conveying the water overboard; and means for circulating the water through the system of pipes when the fires have been drawn, thereby to convey away the heat stored in said boiler.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HAROLD EDGAR YARROW.

Witnesses:

JAMES RITCHIE, CHRISSIE M. WATSON.

Bellies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

